First Battalion, 25th Marine Regiment

U.S. Marines with 1st Battalion 25th Marine Regiment, 4th Marine Division, and Guatemalan Paracaidistas pose for a photo at Puerto San Jose, Guatemala on May 18, 2025. CG25 fosters collaboration by enabling participating nations to share and build on their collective knowledge and experiences. (U.S. Marine corps photo by Sgt. Eduardo Delatorre.)

U.S. Marine Corps Sgt. Colten Merwath a rifleman with 1st Battalion, 25th Marines, 4th Marine Division, teaches Guatemalan Paracaidistas how to properly clear a room for threats at Puerto San Jose, Guatemala on May 18, 2025. CG25 fosters collaboration by enabling participating nations to share and build on their collective knowledge and experiences. (U.S. Marine corps photo by Sgt. Eduardo Delatorre.)

U.S. Marine Corps Sgt. Mark Years, a rifleman with 1st Battalion, 25th Marines, 4th Marine Division, and Guatemalan Paracaidistas rehearse patrolling at Puerto San Jose, Guatemala on May 18, 2025. CG25 fosters collaboration by enabling participating nations to share and build on their collective knowledge and experiences. (U.S. Marine corps photo by Sgt. Eduardo Delatorre.)

U.S. Marines with 1st Battalion, 25th Marines, 4th Marine Division, and Guatemalan Paracaidistas rehearse patrolling at Puerto San Jose, Guatemala on May 18, 2025. CG25 fosters collaboration by enabling participating nations to share and build on their collective knowledge and experiences. (U.S. Marine Corps photo by Sgt. Eduardo Delatorre.)

U.S. Marine Corps Sgt. Anthony Grimshaw, left, and Sgt. Colten Merwath, right, both riflemen with 1st Battalion, 25th Marines, 4th Marine Division, teach Guatemalan Paracaidistas how to properly clear a room for threats at Puerto San Jose, Guatemala on May 18, 2025. CG25 fosters collaboration by enabling participating nations to share and build on their collective knowledge and experiences. (U.S. Marine corps photo by Sgt. Eduardo Delatorre.)

Members of Weapons Co. 1st Battalion, 25th Marine Regiment, Marine Force Reserve, perform a M2 .50 caliber machine gun after a field exercise in Devens Reserve Forces Training Area April 15.

U.S. Marines with 1st Battalion, 25th Marine Regiment, 4th Marine Division conduct a 12-kilometer timed movement during the annual Division Rifle Squad Competition on Marine Corps Base Camp Lejeune, March 08, 2024. The DRSC is a 72-hour competition that fosters the warrior spirit through competition to determine the most combat-effective squad within the 4th MARDIV. The awarded infantry squad will advance to compete in the 2024 service-wide Rifle Squad Competition in Quantico, Virginia. (U.S. Marine Corps photo by Cpl. Jonah White)

U.S. Marines with Alpha Company, 1st Battalion, 25th Marine Regiment, direct lay an M224 60 mm mortar system during a Mission Rehearsal Exercise at Camp Ethan Allen Training Site, Jericho, Vermont, April 13, 2023. MRX is a collective training events with Marine Air Ground Task Force integration to evaluate the Marines’ individual and cooperative capabilities in order to ensure their level of readiness for the upcoming Integrated Training Exercise 4-23 at the Marine Corps Air Ground Combat Center in Twentynine Palms, California, for the largest Marine Corps Reserve exercise of the year (U.S. Marine Corps photo by Staff Sgt. Jestin Costa).

U.S. Marines with Alpha Company, 1st Battalion, 25th Marine Regiment, direct lay an M224 60 mm mortar system during a Mission Rehearsal Exercise at Camp Ethan Allen Training Site, Jericho, Vermont, April 13, 2023. MRX is a collective training events with Marine Air Ground Task Force integration to evaluate the Marines’ individual and cooperative capabilities in order to ensure their level of readiness for the upcoming Integrated Training Exercise 4-23 at the Marine Corps Air Ground Combat Center in Twentynine Palms, California, for the largest Marine Corps Reserve exercise of the year (U.S. Marine Corps photo by Staff Sgt. Jestin Costa).

U.S. Marines with Alpha Company, 1st Battalion, 25th Marine Regiment, direct lay an M224 60 mm mortar system during a Mission Rehearsal Exercise at Camp Ethan Allen Training Site, Jericho, Vermont, April 13, 2023. MRX is a collective training events with Marine Air Ground Task Force integration to evaluate the Marines’ individual and cooperative capabilities in order to ensure their level of readiness for the upcoming Integrated Training Exercise 4-23 at the Marine Corps Air Ground Combat Center in Twentynine Palms, California, for the largest Marine Corps Reserve exercise of the year (U.S. Marine Corps photo by Staff Sgt. Jestin Costa).